2
Introduction
1
WARNINGS
The Southwire 21005N clamp meter is an electrical test tool
that combines a digital multimeter with an AC current sensor.
The hinged jaw on the clamp meter is the current sensor.
When electrical current flows through a wire, a magnetic field
is generated around the wire. The current sensor detects and
measures this magnetic field.
A clamp meter is a convenient test & measurement tool
because it allows a technician to measure the current in a wire
at any point in an electrical system without having to discon-
nect the wire or deenergize the circuit.
The Southwire 21005N clamp meter measures AC current up
to 200A and offers a CAT III 600V safety rating. Other
functions include AC and DC voltage, resistance, continuity,
and diode test. This meter is fully tested and calibrated and,
with proper use, will provide many years of reliable service.
• Read, understand and follow Safety Rules and Operating
Instructions in this manual before using this meter.
• The meter’s safety features may not protect the user if not
used in accordance with the manufacturer’s instructions.
• Ensure that the test leads are fully seated in the input jacks
and keep fingers behind the finger guards when taking
measurements.
• Before changing functions using the selector switch, always
disconnect the test leads from the circuit under test.
• Use only UL listed test leads with the proper safety
category rating.
• Comply with all safety codes. Use approved personal
protective equipment when working near live electrical
circuits - particularly with regard to arc-flash potential.
• Use caution when working on or near bare conductors or
bus bars.
• Use caution on live circuits. Voltages above 30 V AC RMS,
42 V AC peak, or 60 V DC pose a shock hazard.
• Do not use meter or test leads if either appears damaged.
• Do not use the meter in wet or damp environments or
during electrical storms.
• Do not use the meter near explosive vapors, dust, or
gasses.
• Do not use the meter if it operates incorrectly. Protection
may be compromised.
• Do not operate meter while Low Battery warning is on.
Replace the batteries immediately.
• Verify meter’s operation by measuring known voltage.
• Do not apply voltage or current that exceeds the meter’s
maximum rated input limits.
10A
CATIII600V
Finger Guard
